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A research conducted by the scientists from The National Center for Atmospheric Research in Boulder, Colorado, showed that the amount of oxygen really increases and decreases during the seasons, and it reaches its maximum in summer months. The explanation of this phenomenon may be the fact that plants intensively give off oxygen throughout these months. Another interesting fact is that oxygen changes the level of dissolubility as the temperature of oceans changes. However, these changes of oxygen's presence aren't very important as their real significance is negligible.